<SEC-DOCUMENT>0001193125-23-217065-index.html : 20230821
<SEC-HEADER>0001193125-23-217065.hdr.sgml : 20230821
<ACCEPTANCE-DATETIME>20230821171559
ACCESSION NUMBER:		0001193125-23-217065
CONFORMED SUBMISSION TYPE:	PRE 14A
PUBLIC DOCUMENT COUNT:		6
CONFORMED PERIOD OF REPORT:	20230921
FILED AS OF DATE:		20230821
DATE AS OF CHANGE:		20230821

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SYNLOGIC, INC.
		CENTRAL INDEX KEY:			0001527599
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				261824804
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		PRE 14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-37566
		FILM NUMBER:		231190011

	BUSINESS ADDRESS:	
		STREET 1:		301 BINNEY STREET
		STREET 2:		SUITE 402
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02142
		BUSINESS PHONE:		617-401-9975

	MAIL ADDRESS:	
		STREET 1:		301 BINNEY STREET
		STREET 2:		SUITE 402
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02142

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Mirna Therapeutics, Inc.
		DATE OF NAME CHANGE:	20110809
</SEC-HEADER>
<DOCUMENT>
<TYPE>PRE 14A
<SEQUENCE>1
<FILENAME>d539010dpre14a.htm
<DESCRIPTION>PRE 14A
<TEXT>
Document 1 - file: d539010dpre14a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g539010dsp018.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: g539010dsp018.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g539010dsp019.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g539010dsp019.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g539010g17r87.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g539010g17r87.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>g539010g52i20.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: g539010g52i20.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>g539010g90u75.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: g539010g90u75.jpg

</DOCUMENT>
</SEC-DOCUMENT>